CHEMICAL REACTION ENGINEERING QUIZ

If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the

Pressure

Neither A nor B

Both A & B

Temperature

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YOUR ANSWER : ?

A space velocity of 5 hr⁻¹ means that

Five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour

A fixed conversion of a given batch of feed takes 5 hours

After every 5 hours, reactor is being filled with the feed

Cent per cent conversion can be achieved in at least 5 hours

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A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction.

Equal to or more than

Less than

Equal to

More than

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Which of the following is a controlling factor in very fast heterogeneous reaction?

Temperature

Composition of reactant

Pressure

Heat and mass transfer effects

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YOUR ANSWER : ?

The percent conversion of ethanol in the reactor is

95

100

2.5

97.5

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YOUR ANSWER : ?

The reaction between oxygen and organic material is a/an __________ reaction.

Exothermic

Biochemical

Endothermic

Photochemical

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Arhenious equation shows the variation of __________ with temperature.

Energy of activation

Frequency factor

Rate constant

Reaction rate

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The order of a chemical reaction is

None of these

Never fractional

An experimentally determined quantity

Always equal to the total stoichiometric number of reactants

TRUE ANSWER : ?
YOUR ANSWER : ?

Half life period of a first order irreversible reaction A → B is

Ln 0.5/k

Ln k/2

Ln 2/k

K/2

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YOUR ANSWER : ?

Maximum equilibrium conversion for endothermic reaction is obtained at the __________ temperature.

Intermediate

Highest possible

Lowest possible

Room

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